The Edict of Milan and the Ecumenical Councils (c. 313 AD)

The word edict comes from the Latin word edictum, which means “something publicly declared” or “a proclamation spoken forth.” It comes from the verb edicere, meaning “to announce,” “to declare openly,” or “to publish with authority.” An edict is a public legal decree issued by a ruler, and the Edict of Milan was the imperial declaration that made persecution of Christians illegal, without defining or changing the faith itself, which this took place in the city of Milan, Italy.

For nearly three centuries before 313 AD, Christianity had been regarded by Roman authorities as a dangerous superstition. Christians refused to worship the emperor, rejected pagan sacrifices, and confessed allegiance to Christ alone. This was interpreted not merely as religious dissent, but as political disloyalty. Periods of persecution varied in intensity, but they reached their fiercest expression under Emperor Diocletian at the end of the third century. Churches were destroyed, Scriptures burned, clergy imprisoned, and believers forced to choose between sacrifice and death.

Yet the persecutions failed. The Church did not disappear; she grew. The blood of the martyrs became the seed of the Church, just as Christ had foretold: “have persecuted me, they will also persecute you; if” (John 15:20, KJV). What Roman power sought to crush only strengthened Christian conviction. By the early fourth century, Christians were present in every major city of the empire, within the army, the bureaucracy, and even the imperial household. The attempt to eradicate the faith had proven impossible.

After the Roman Emperor Diocletian abdicated, the empire entered a period of instability and civil war. Multiple emperors claimed authority, and the unity of Rome itself was threatened. It was within this fractured political landscape that Emperor Constantine emerged. Though raised in a pagan environment, Constantine was not devoted to the traditional gods in the manner of earlier emperors. He was pragmatic, observant, and acutely aware that the old religious structures no longer commanded universal loyalty.

According to early Christian testimony, before a decisive battle against his rival Maxentius in 312 AD, Constantine experienced a sign associated with Christ. Eusebius of Caesarea records that Constantine saw a cross accompanied by the words the sign under which Constantine was told he would conquer. The significance of this lies not in spectacle, but in consequence: Constantine came to believe that victory and authority were not secured by the old gods, but by the God of the Christians.

After defeating Maxentius at the Battle of the Milvian Bridge, Constantine did not immediately make Christianity the state religion, nor did he abolish pagan worship. Instead, he acted cautiously and deliberately. He recognized that the empire could no longer be held together by coercive religious uniformity. Persecution had failed; tolerance was now politically necessary. But beyond political calculation, Constantine also perceived something deeper: Christians were loyal subjects, disciplined communities, and people formed by moral conviction rather than fear.

In 313 AD, Constantine met with Licinius, the eastern emperor, in the city of Milan. Together they issued what has come to be known as the Edict of Milan. Strictly speaking, it was not a single legislative document, but a policy declaration affirming that all religions, including Christianity, were to be practiced freely, and that property confiscated from Christians during persecutions was to be restored.

The edict stated that no one should be denied the freedom to worship according to conscience, the edict's own words, granting that whatever divinity there be might be favourable to the empire. This language reflects Roman legal caution, but the practical effect was unmistakable: Christianity was no longer illegal. The Church emerged from hiding not by revolt, but by endurance.

It is crucial to understand what the Edict of Milan did not do. It did not define doctrine. It did not establish catholicity. It did not grant the Church authority. The Church already possessed authority through Christ and the apostles. What the edict did was remove the threat of state violence, allowing the Church to address openly the internal doctrinal crises that persecution had previously suppressed or delayed.

As our Lord Jesus stated: “saith he unto them, Render therefore unto Caesar the things which are Caesar’s; and unto God the things that” (Matthew 22:21, KJV).

Ironically, persecution had enforced a certain unity. Under threat of death, Christians clung tightly to the apostolic confession. Once peace came, theological disagreements surfaced more openly. Teachers who had previously spoken in whispers now taught publicly. Heresies that had existed on the margins gained followers. The Church, now visible, was also vulnerable, not to extinction, but to internal fracture.

This is why the Edict of Milan is inseparable from the rise of the Ecumenical Councils. Peace did not preserve truth automatically; it required vigilance. As Saint Athanasius later observed, heresies did not arise because Scripture was unclear, but because men read it apart from the Church. “Knowing this first, that no prophecy of the scripture is of any private interpretation” (2 Peter 1:20, KJV). With the threat of persecution removed, the Church had to speak clearly and publicly about who Christ is, what salvation means, and what faith must be confessed.

From an Orthodox perspective, the Edict of Milan must therefore be understood as an act of divine providence, not because Constantine was a theologian, but because God used historical circumstances to allow the Church to fulfill her mission in a new way. The Church did not become dependent on the empire; rather, the empire was compelled to recognize a reality it could no longer control.

Saints and Fathers later reflected on this moment with sobriety, not triumphalism. They understood that peace was both a gift and a test. The sword had been sheathed, but the tongue now became the battlefield. Confession would now be demanded not only from martyrs, but from bishops, theologians, and councils.

Thus the Edict of Milan stands at a threshold in history. It marks the end of imperial persecution and the beginning of conciliar confession. It did not create the Church, but it revealed her. It did not guarantee unity, but it made visible the need to guard it. And through it, God prepared the ground for the Ecumenical Councils, by which the Church would confess with one voice the faith she had always held, now spoken openly “before kings and rulers” (Luke 21:12, KJV).

A Foundational Principle (Before the Councils)

First, a principle the Fathers are explicit about:

Councils are not attacked by pagans first, but by Christians who refuse correction.

Saint Athanasius states this plainly:

St Athanasius observed that the heresies which corrupt the Church do not come upon her from outside, but arise from men within her who speak perverse things.

And Scripture itself foretells this pattern:

“Also of your own selves shall men arise, speaking perverse things, to draw away disciples after them” (Acts 20:30, KJV).

With that in mind, let us now name the assaults.

The First Ecumenical Council: Nicaea (325)

The first and foundational council was convened at Nicaea in 325, in response to the teaching of Arius, a presbyter of Alexandria, who dared to say that the Son of God was not eternal, but a creature. Arius claimed, “There was a time when He was not,” thus denying that the Son shares fully in the divine being of the Father. Though Arius used biblical language, he emptied it of apostolic meaning, reducing the Son to a created intermediary rather than true God.

The Church responded not with novelty, but with fidelity. Drawing upon the apostolic witness, “In the beginning was the Word, and the Word was with God, and the Word was God” (John 1:1, KJV), the bishops confessed that the Son is homoousios with the Father, that is, “of one essence.” This term did not add to Scripture, but safeguarded its meaning, preventing the Word from being reinterpreted according to human philosophy.

Saint Athanasius, who stood almost alone against the Arian tide, explained the necessity of this confession with clarity and power:

St Athanasius pressed the consequence: if the Son is a creature, then man is not redeemed, for no creature can join us to God.

And again:

“He was made man that we might be made God; and He manifested Himself by a body that we might receive the idea of the unseen Father; and He endured the insolence of men that we might inherit immortality.” (St Athanasius the Great, On the Incarnation 54, NPNF 2nd series, vol. 4).

The Nicene Creed thus preserved salvation itself, for only if Christ is truly God can He truly save. The council did not divide the Church, but restored unity by cutting off false teaching. Those who refused the confession separated themselves, not because the Church changed, but because they would not abide in the truth.

The Second Ecumenical Council: Constantinople I (381)

Heresy Addressed: Pneumatomachianism (Denial of the Divinity of the Holy Spirit)

After the First Ecumenical Council at Nicaea confessed the Only-Begotten Son as true God, consubstantial with the Father, the Church did not suppose that the adversary had been silenced forever. For heresy, when cut down in one form, often reappears in another, seeking new paths to undermine the mystery of salvation. Thus, while Arianism had been condemned, its spirit persisted, and from its roots arose a new and dangerous error: the denial of the full divinity of the Holy Spirit. Those who taught this error were later called Pneumatomachians, or “fighters against the Spirit.”

Among those associated with this teaching were Macedonius, the former bishop of Constantinople, as well as figures such as Eustathius of Sebaste and others who, while claiming fidelity to Nicaea, subtly diminished the Spirit’s glory.

The Pneumatomachians claimed to honor the Father and the Son, yet they reduced the Holy Spirit to a creature, a ministering force, or a subordinate power. Some called Him the highest of angels; others described Him as an impersonal energy. Though they used biblical words, they refused biblical meaning. In doing so, they struck not at an abstract doctrine, but at the very life of the Church. For if the Spirit is not God, then the Church does not truly live by God, nor is humanity truly sanctified.

By which our beloved St. Paul clearly states, “through the eternal Spirit offered himself without spot to God” (Hebrews 9:14, KJV). By which he, quote unquote, states “eternal,” which is a quality only ascribed to God.

The Apostle Paul teaches plainly: “the Spirit searcheth all things, yea, the deep things of God” (1 Corinthians 2:10, KJV). A creature cannot search the depths of God, nor can one who is not God bestow divine life. And again: “the Lord is that Spirit” (2 Corinthians 3:17, KJV). If the Spirit is not fully divine, then baptism does not unite us to God, the Eucharist does not sanctify, and prayer does not raise us to heaven. Thus Pneumatomachianism, like Arianism before it, threatened salvation itself.

Seeing this danger, the bishops of the Church gathered in Constantinople in the year 381 AD, under the Roman Emperor Theodosius, to complete the Trinitarian confession begun at Nicaea. They did not overturn the Nicene faith, but reaffirmed and expanded it, clarifying what had been attacked. As the Apostle teaches, “one hope of your calling; One Lord, one faith, one baptism, One God and Father of all, who is” (Ephesians 4:4 to 6, KJV). The Council confessed that the Holy Spirit is not a servant of God, but God Himself.

The bishops proclaimed the Holy Spirit to be “the Lord and Giver of life, who proceeds from the Father, who with the Father and the Son together is worshiped and glorified.” This confession was not speculative, but biblical and apostolic. The Lord Himself declared: “you from the Father, even the Spirit of truth” (John 15:26, KJV), and again: “when he, the Spirit of truth, is come, he will guide you into all” (John 16:13, KJV). Only God can guide into all truth; only God can give life.

Saint Basil the Great, who labored tirelessly to defend the Spirit’s divinity, explained that the Spirit’s work reveals His nature. He wrote:

St Basil enumerated what the Spirit works in us: paradise restored, the kingdom opened, adoption as sons, the boldness to call God Father.

These are not the works of a creature. Adoption, sanctification, illumination, and communion with God belong to God alone. Basil also warned that to deny the Spirit’s divinity is to tear apart the unity of the Trinity, reducing Christian faith to an incomplete and lifeless confession.

The Council thus confessed one God in three Persons, preserving unity without confusion and distinction without division. The Father is not the Son, the Son is not the Spirit, yet each is fully and eternally God. This mystery was not explained away, but confessed and worshiped. As the Church had always prayed, so she now confessed with clarity what she had always believed.

The Nicene Creed, completed at Constantinople, became the universal rule of faith. It bound together East and West, clergy and laity, scholars and martyrs, in one confession of the Holy Trinity. This Creed was not a theological ornament, but a boundary of life, defining who God is and how He saves. As the Apostle teaches, “no man can say that Jesus is the Lord, but by the Holy” (1 Corinthians 12:3, KJV). To deny the Spirit is to deny the confession itself.

Yet, as before, not all received the Council with obedience. Some clung to diminished views of the Spirit, preferring rational simplicity over revealed mystery. In doing so, they separated themselves from the Church’s worship, for the Church had always glorified the Spirit together with the Father and the Son. The Council did not create division; it exposed it. Unity was preserved in truth, not in ambiguity.

The Second Ecumenical Council thus stands as a safeguard of the Church’s life. It teaches that salvation is not merely forgiveness of sins, but participation in divine life, made possible by the indwelling of the Holy Spirit. Without the Spirit’s full divinity, Christianity collapses into moralism; with Him, it becomes communion with the living God.

In confessing the Spirit as Lord and Giver of life, the Church protected her worship, her sacraments, and her very existence. For the Church lives not by human strength, nor by institutional power, but by the Spirit who descended at Pentecost and remains forever. As the Psalmist proclaims, “Thou sendest forth thy spirit, they are created: and thou renewest the face of the earth” (Psalm 104:30, KJV).

Thus Constantinople I stands beside Nicaea as a pillar of the one faith. Together, they proclaim that the God who saves is not divided, not partial, not incomplete, but Father, Son, and Holy Spirit, one God, worshiped and glorified unto the ages of ages.

The Third Ecumenical Council: Ephesus (431)

Heresy Addressed: Nestorianism

After the Church had confessed the Son as true God at Nicaea and the Holy Spirit as Lord and Giver of life at Constantinople, she did not imagine that the mystery of Christ had been fully secured against distortion. For the enemy, unable to deny openly the divinity of the Son, sought instead to divide His incarnation, separating what God had united. Thus arose the heresy known as Nestorianism, which struck at the very heart of the Gospel by dividing the Person of Christ.

Nestorius, who became Patriarch of Constantinople, sought to preserve the transcendence of God by refusing to confess that God was truly born of the Virgin Mary. He rejected the title Theotokos (“God-bearer”), proposing instead Christotokos (“Christ-bearer”). Though this appeared cautious and pious in speech, it concealed a dangerous division in thought. For Nestorius spoke as though there were two subjects in Christ, one divine and one human, loosely united by cooperation or moral agreement. In doing so, he separated the Word from the flesh He assumed, undermining the Incarnation itself.

Yet the apostolic proclamation is clear and unambiguous: “the Word was made flesh, and dwelt among us, (and” (John 1:14, KJV). The Word did not merely dwell beside a man, nor did He merely inspire a human person; He Himself became man. The One who was born of the Virgin is none other than the eternal Son of God. To divide Christ into two subjects is to destroy the mystery of salvation, for if the One who suffers and dies is not truly God, then humanity is not truly redeemed.

The Church therefore gathered at Ephesus in the year 431 AD, under the leadership of Saint Cyril of Alexandria, to defend the unity of Christ’s Person. The bishops did not invent a new devotion to the Virgin, nor did they elevate her beyond measure. Rather, they confessed Theotokos in order to confess Christ rightly. The title was not about Mary in isolation, but about the identity of the One she bore.

Saint Cyril expressed this with apostolic clarity:

“For we do not say that the nature of the Word was changed and became flesh, or that it was converted into a whole man consisting of soul and body; but rather that the Word having personally united to himself flesh animated by a rational soul, did in an ineffable and inconceivable manner become man.” (St Cyril of Alexandria, Second Letter to Nestorius, NPNF 2nd series, vol. 14).

And again, in words received by the Council as authoritative:

“If anyone will not confess that the Emmanuel is very God, and that therefore the Holy Virgin is the Mother of God (Θεοτόκος), inasmuch as in the flesh she bore the Word of God made flesh as it is written, “The Word was made flesh” let him be anathema.” (St Cyril of Alexandria, the First of the Twelve Anathemas, appended to his Third Letter to Nestorius, NPNF 2nd series, vol. 14).

This confession was not novel. It echoed the witness of Scripture itself. Elizabeth, filled with the Holy Spirit, cried out to Mary: “whence is this to me, that the mother of my Lord should come to me?.” (Luke 1:43, KJV). The Lord whom Mary bore is God Himself. To deny this is to deny Emmanuel, God with us. “Behold, a virgin shall be with child, and shall bring forth a son, and they shall call his name Emmanuel, which being interpreted is, God with us” (Matthew 1:23, KJV).

And as also prophesied by the holy prophet Isaiah: “unto us a child is born, unto us a son is given: and the government shall be upon his shoulder: and his name shall be called Wonderful, Counsellor, The mighty God, The everlasting Father, The Prince of Peace” (Isaiah 9:6, KJV).

Nestorianism, therefore, was not a minor terminological dispute, but a Christological rupture. By dividing Christ, it divided salvation. For the Fathers understood that what is not united to God is not healed. If the humanity of Christ is not truly the humanity of the Word, then human nature is not truly lifted up, sanctified, and glorified. As Saint Gregory the Theologian had earlier warned: “For that which He has not assumed He has not healed; but that which is united to His Godhead is also saved.” (St Gregory the Theologian, Epistle 101 (to Cledonius), NPNF 2nd series, vol. 7).

The Council of Ephesus affirmed that Christ is one Person, the Word incarnate, who acts and suffers in the flesh without ceasing to be God. The same Person who calms the sea also sleeps in the boat; the same Person who raises Lazarus weeps at his tomb; the same Person who is eternal is born in time. This unity is not confusion, nor is it division; it is the mystery of the Incarnation confessed in worship and proclaimed in faith.

By condemning Nestorianism, the Council preserved not only Christology, but the unity of the Church. For if Christ is divided, then His Body cannot remain one. The Apostle teaches: “There is one body, and one Spirit, even as ye are called in” (Ephesians 4:4 to 5, KJV). The unity of the Church flows from the unity of Christ Himself.

Yet, as in previous councils, not all received the conciliar witness with obedience. Nestorius and his followers refused correction, preferring their reasoning to the Church’s confession. Thus division followed, not because the Church altered the faith, but because communion was broken by refusal to submit to the apostolic tradition safeguarded in council.

The Council of Ephesus stands, therefore, as a bulwark of the Incarnation. It teaches that God truly entered history, truly assumed human nature, and truly united humanity to Himself. It also reveals the Church’s method: when the mystery of Christ is threatened, the Church gathers, prays, listens to the Fathers, and confesses with one voice what she has always believed.

In confessing Mary as Theotokos, the Church confesses Christ as one. In confessing Christ as one, she preserves salvation. And in preserving salvation, she preserves unity, unity not of opinion, but of truth, rooted in the living Word who became flesh for the life of the world.

The Fourth Ecumenical Council: Chalcedon (451)

Heresy Addressed: Eutychianism / Monophysitism

After the Church had defended the unity of Christ’s Person at Ephesus, the enemy, unable to divide Christ into two sons, sought instead to dissolve His humanity into His divinity. Thus arose the error known as Eutychianism, later called Monophysitism, which taught that after the Incarnation there was in Christ only one nature. Though its proponents claimed to honor the divinity of the Word, they did so at the expense of His true humanity, thereby threatening the reality of salvation.

Eutyches, an archimandrite in Constantinople, spoke as though Christ’s humanity were swallowed up by His divinity. In attempting to guard unity, he destroyed distinction. Yet the apostolic faith confesses neither separation nor confusion. For the Apostle teaches plainly: “there is one God, and one mediator between God and men, the man Christ Jesus” (1 Timothy 2:5, KJV). If Christ is not truly man after the Incarnation, then He cannot mediate for men; and if He does not retain our humanity, then our humanity is not healed.

The Church therefore gathered at Chalcedon in 451, to clarify, not to correct, the faith confessed at Nicaea, Constantinople, and Ephesus. The Council did not abandon the unity proclaimed by Saint Cyril, but protected it from distortion. For unity that destroys reality is not true unity, but confusion.

“God is not the author of confusion, but of peace, as in all churches of the saints” (1 Corinthians 14:33, KJV).

Drawing upon Scripture and the Fathers, the bishops confessed that Christ is one and the same Son, perfect in divinity and perfect in humanity, truly God and truly man, consubstantial with the Father according to divinity and consubstantial with us according to humanity. He is one Person in two natures, divine and human, united “without confusion, without change, without division, without separation.”

This confession preserved the full truth of the Incarnation. The Word did not merely appear human, nor did He absorb humanity into divinity. Rather, He assumed human nature entirely, body, soul, mind, and will, and united it to Himself. As the Apostle writes, “Forasmuch then as the children are partakers of flesh and blood, he also himself likewise took part of the same; that through death” (Hebrews 2:14, KJV). What He assumed, He healed; what He healed, He glorified.

The Tome of Saint Leo of Rome, received and acclaimed at the Council, expressed this balance with clarity:

“Each nature performs what is proper to it, in communion with the other; the Word doing what belongs to the Word, and the flesh carrying out what belongs to the flesh.”

This teaching did not divide Christ into two subjects, nor did it confuse His natures. Rather, it confessed one acting Person, the eternal Son, who works and suffers in the flesh without ceasing to be God. The same Person who raises the dead also dies; the same Person who commands the winds is born of a woman; the same Person who is eternal enters time.

Monophysitism, by contrast, undermined the Gospel by denying the continuing reality of Christ’s humanity. If Christ’s humanity is dissolved, then His obedience is not human obedience; His suffering is not human suffering; His death is not truly our death. Salvation becomes symbolic rather than real. Yet Scripture proclaims a real Incarnation and a real redemption: “learned he obedience by the things which he suffered” (Hebrews 5:8, KJV). One who lacks true humanity cannot learn obedience as man.

The Council of Chalcedon thus safeguarded salvation by safeguarding reality. It preserved both the unity of Christ and the integrity of His natures. It confessed mystery without contradiction, refusing both rational simplification and theological excess.

Yet here, sorrow entered the history of the Church. Some, unable or unwilling to receive the Chalcedonian definition, rejected the Council and broke communion with the catholic Church. This division did not arise because the Church altered the faith, but because obedience to the conciliar witness was refused. The Council sought to heal misunderstanding, but pride and fear hardened hearts.

Saint Cyprian had warned centuries earlier:

“The episcopate is one, each part of which is held by each one for the whole. The Church also is one, which is spread abroad far and wide into a multitude by an increase of fruitfulness.” (St Cyprian of Carthage, On the Unity of the Church 5, ANF vol. 5).

To separate from the episcopal communion of the Church is to separate from the unity Christ established. The schism following Chalcedon was therefore not merely theological, but ecclesial. It wounded the visible unity of the Church, even as the faith itself remained unchanged.

This moment teaches a lasting lesson: orthodoxy requires both right belief and humble obedience. One may speak zealously for Christ, yet wound His Body by refusing the Church’s conciliar voice. As Saint Athanasius himself endured exile rather than compromise, so the Church teaches that truth is preserved not by force, not by numbers, but by fidelity to what has been confessed together.

The Coptic Church’s rejection of Chalcedon is wrong because it refuses the Church’s clear confession that Christ remains fully and truly human after the Incarnation. By insisting on speaking only of “one nature” after the union and rejecting the language of two natures, the Coptic position obscures the continuing reality of Christ’s humanity. This makes Christ’s obedience, suffering, and human action less clear, even if not intentionally denied.

Among those who rejected the Council of Chalcedon were the churches of Egypt, from which later arose what is now known as the Coptic Church. It must be stated with care and truth that the Copts did not consciously intend to deny the divinity of Christ, nor did they openly profess the crude teaching of Eutyches, who taught that Christ’s humanity was absorbed or destroyed. Rather, their error lay in a refusal to receive the Chalcedonian definition, rooted in fear, misunderstanding, and attachment to particular formulas rather than to the conciliar confession of the whole Church.

The Egyptian bishops, influenced by political tensions, linguistic differences, and deep mistrust of imperial authority, believed that Chalcedon betrayed the teaching of Saint Cyril of Alexandria, especially his insistence on “one incarnate nature of the Word.” Yet Chalcedon did not deny Cyril; it protected him. The Council explicitly rejected Nestorian division and confessed one Person, the Word incarnate, precisely as Cyril taught. What Chalcedon added was clarity: that this one Person exists in two natures, divine and human, after the union.

The error of the Copts was therefore not primarily one of intention, but of reception and obedience. They mistook distinction for division, and in rejecting the language of “two natures,” they placed themselves outside the conciliar witness of the Church. In doing so, they preserved certain orthodox phrases while refusing the Church’s authoritative interpretation of them. This refusal, however sincere, resulted in a Christology that could no longer clearly confess the continuing, full reality of Christ’s humanity after the Incarnation.

Yet even in sorrow, the Council bears witness to Christ’s prayer: “That they all may be one; as thou, Father, art in me, and I in thee” (John 17:21, KJV). Chalcedon did not divide Christ; men divided themselves from communion. The truth remained whole, even as the Body suffered.

Thus the Fourth Ecumenical Council stands as a pillar of the Orthodox faith, confessing one Christ, fully God and fully man, unconfused, undivided, saving humanity by uniting it to God forever.

The Fifth Ecumenical Council: Constantinople II (553)

Heresy Addressed: Residual Nestorianism (The “Three Chapters”)

After the Council of Chalcedon had confessed Christ as one Person in two natures, divine and human, without confusion or division, the Church did not imagine that the mystery of the Incarnation had been secured against all distortion. For heresy is often subtle, hiding not in open denial but in ambiguity, and seeking to reenter explained truths under new guises. Thus, in the years following Chalcedon, residual Nestorian tendencies continued to trouble the Church, especially through certain writings and interpretations that came to be known as the “Three Chapters.”

These Three Chapters consisted of (1) the person and writings of Theodore of Mopsuestia, (2) certain writings of Theodoret of Cyrus against Saint Cyril of Alexandria, and (3) the letter of Ibas of Edessa to Maris. Though some defended these texts as compatible with Chalcedon, others recognized that they subtly reintroduced a divided Christology, one that spoke as though Christ’s humanity were a separate subject alongside the Word. This lingering Nestorianism, if left uncorrected, threatened to hollow out the Chalcedonian confession from within.

The Church therefore gathered at Constantinople in the year 553 AD, under Roman Emperor Justinian, not to revise Chalcedon, but to interpret and defend it rightly. The aim of the Council was pastoral and doctrinal: to remove ambiguity, to reconcile those who had misunderstood Chalcedon, and to make clear that the Church had never accepted, and would never accept, a divided Christ.

The bishops affirmed unequivocally that Chalcedon is to be read in continuity with Nicaea, Constantinople, and Ephesus, and especially with the Christological teaching of Saint Cyril of Alexandria. For Chalcedon confessed two natures, but never two sons; distinction without division, not separation of subjects. The Council therefore condemned the Three Chapters, not because every phrase in them was equally erroneous, but because their overall tendency undermined the unity of Christ’s Person.

Scripture itself demands this unity. The Apostle Paul writes: “in him dwelleth all the fulness of the Godhead bodily” (Colossians 2:9, KJV). He does not say “in them,” nor does he speak of a conjunction of persons, but of one Christ in whom divine fullness dwells bodily. Likewise, the Apostle proclaims: “One Lord, one faith, one baptism” (Ephesians 4:5, KJV). A divided Christ produces a divided salvation and a fractured Church.

The Fifth Council therefore reaffirmed the teaching of Saint Cyril, who insisted that all actions and sufferings of Christ belong to one and the same Person, the Word incarnate. Cyril had written:

“One is the Son, one is the Lord Jesus Christ, even though He is known to exist in two natures.”

This principle guided the Council’s judgments. The humanity of Christ is not an independent agent acting alongside the Word, but the humanity of the Word Himself. When Christ hungers, it is the Word who hungers in the flesh; when Christ suffers, it is the Word who suffers in the flesh; when Christ redeems, it is the Word who redeems humanity by His own human obedience. As Scripture testifies: “have crucified the Lord of glory” (1 Corinthians 2:8, KJV). The subject is one.

By condemning the Three Chapters, the Council did not overturn Chalcedon, but protected it from misinterpretation. It clarified that Chalcedon must never be read as permitting Nestorian categories or language. The two natures confession is not a license for division, but a safeguard against confusion. The Church thus demonstrated an essential principle of conciliar life: doctrine does not change, but it is clarified when challenged.

This Council also revealed that true unity is not achieved by silence or ambiguity, but by truth spoken in love. Some feared that condemning the Three Chapters would disturb peace or reopen old wounds. Yet the Church understood that peace without truth is fragile, and unity built on obscurity is temporary. As the Prophet teaches: “They have healed also the hurt of the daughter of my people slightly, saying, Peace, peace; when there is no peace” (Jeremiah 6:14, KJV).

The Fifth Ecumenical Council therefore stands as a witness to the Church’s responsibility to interpret her own councils faithfully. No council exists in isolation; each is read within the living Tradition of the Church. Constantinople II shows that fidelity sometimes requires clarification, and that unity sometimes requires correction, not to dominate, but to heal.

Those who resisted the Council often did so not out of overt heresy, but out of attachment to particular teachers or fears of doctrinal instability. Yet the Church teaches that loyalty to Christ must surpass loyalty to any theologian, however learned. As Saint Athanasius himself had endured exile rather than compromise, so the Church here chose clarity over convenience.

The Fifth Ecumenical Council thus preserved the Church from a quiet relapse into division. It reaffirmed that Christ is one, that salvation is one, and that the Church must confess with one voice. It strengthened the bonds between Chalcedon and Ephesus, showing that the Church does not contradict herself, but speaks more clearly when challenged.

In doing so, Constantinople II guarded not only Christology, but ecclesiology. For a divided Christ yields a divided Church, but a confessed unity preserves communion. As the Lord Himself prayed: “That they all may be one” (John 17:21, KJV). This Council served that prayer by ensuring that the one Christ is confessed without division, ambiguity, or compromise.

The Sixth Ecumenical Council: Constantinople III (680 to 681)

Heresy Addressed: Monothelitism (Denial of Christ’s Human Will)

After the Church had confessed at Chalcedon that Christ is one Person in two natures, divine and human, without confusion or division, a new and more subtle error arose, seeking to appear as a compromise while quietly undermining the fullness of the Incarnation. This error was called Monothelitism, the teaching that Christ possesses only one will. Its proponents claimed that this preserved unity and avoided division, yet in truth it diminished Christ’s humanity and threatened the reality of salvation.

Monothelitism arose partly as a political and ecclesial attempt to heal the wounds left after Chalcedon. Some reasoned that if Christ had one will, then perhaps unity could be restored without reopening Christological disputes. Yet the Church recognized that unity purchased at the cost of truth is not unity, but deception. For if Christ lacks a human will, then He is not fully human; and if He is not fully human, then humanity is not fully redeemed.

The Apostle teaches that “wherefore in all things it behoved him to be made like unto his brethren” (Hebrews 2:17, KJV). A will is not an accidental feature of humanity, but essential to it. To deny Christ a human will is to deny Him a human obedience. Yet Scripture clearly reveals Christ’s human will in action. In Gethsemane He prays: “Saying, Father, if thou be willing, remove this cup from me: nevertheless not my will, but thine, be done” (Luke 22:42, KJV). Here the distinction is unmistakable: Christ speaks as man, offering His human will in perfect obedience to the divine will.

The Church therefore gathered at Constantinople in 680 to 681, to defend the fullness of the Incarnation against this subtle erosion. The bishops confessed that Christ possesses two wills and two energies, divine and human, united harmoniously in the one Person of the Word. The human will of Christ is not opposed to the divine will, but freely and perfectly aligned with it. In this obedience, humanity is healed.

This confession safeguarded the very meaning of salvation. For salvation is not accomplished by divine power alone, but by divine power working through true human obedience. As the Apostle Paul writes: “as by one man’s disobedience many were made sinners, so by the obedience of one shall many be made righteous” (Romans 5:19, KJV). If Christ has no human will, then He has no human obedience, and Adam’s disobedience remains unhealed.

Saint Maximus the Confessor, who suffered exile, mutilation, and death rather than accept Monothelitism, articulated this truth with clarity and courage. He taught that Christ’s human will freely cooperates with His divine will, restoring human freedom rather than abolishing it. Though his tongue was cut out and his hand severed, his confession could not be silenced, for it was the confession of the Church itself.

Maximus explained that the human will of Christ is the instrument by which human nature is restored to right relationship with God. Without it, salvation becomes coercive rather than transformative. Yet Scripture teaches that Christ redeems humanity from within, not by overriding it, but by healing it. “learned he obedience by the things which he suffered” (Hebrews 5:8, KJV). Learning obedience presupposes a human will capable of obedience.

The Council therefore condemned Monothelitism as incompatible with the apostolic faith. It affirmed that Christ’s two wills do not imply division, for will follows nature, not person. Since Christ has two natures, He has two wills, yet He remains one acting Person. This teaching preserved both Chalcedon’s confession of two natures and Ephesus’ confession of one Person.

The Sixth Ecumenical Council also demonstrated that even well intentioned compromises can become sources of grave error when they attempt to simplify mystery beyond what revelation allows. The Church does not resolve mystery by reduction, but by faithful confession. As Saint Gregory the Theologian had warned long before: “For that which He has not assumed He has not healed; but that which is united to His Godhead is also saved.” (St Gregory the Theologian, Epistle 101 (to Cledonius), NPNF 2nd series, vol. 7). This applies not only to flesh and soul, but to will and freedom as well.

By confessing two wills in Christ, the Church affirmed that human freedom is not abolished by grace, but perfected. Christ does not save us by acting in place of humanity, but by acting as humanity, offering to the Father the obedience that Adam refused. In Him, the human will is healed, restored, and glorified.

The Council also served the unity of the Church by rejecting false peace. Some urged silence, fearing division. Yet the Church chose truth over quiet. As the Apostle commands: “speaking the truth in love” (Ephesians 4:15, KJV). Only truth can sustain unity, for unity without truth is temporary, but unity in truth endures.

Thus Constantinople III stands as a guardian of the fullness of the Incarnation. It teaches that Christ is not a diminished man, nor a partial redeemer, but fully God and fully man in every respect, including will. It also teaches that obedience is not weakness, but the path to glory, for Christ’s human obedience becomes the source of our salvation.

The Sixth Ecumenical Council therefore preserved the integrity of Christology, the reality of redemption, and the dignity of human freedom. In doing so, it safeguarded the Church’s confession and ensured that the Gospel remains not an abstraction, but the living power of God at work within human nature itself.

The Seventh Ecumenical Council: Nicaea II (787)

After the Church had confessed the Holy Trinity, the unity of Christ’s Person, the distinction of His natures, and the fullness of His humanity, including His human will, there remained one final assault upon the mystery of the Incarnation itself. This assault did not arise primarily in words or formulas, but in practice and worship, and it arose not because icons were new, but precisely because they were ancient, widespread, and deeply embedded in the life of the Church. It was the heresy known as Iconoclasm, the rejection and destruction of holy icons.

From the earliest centuries, Christians had depicted Christ, the Mother of God, the angels, and the saints, not as idols, but as confessions in color. Long before Christianity was legalized, images of Christ as the Good Shepherd, the healing miracles, and scenes from the Gospel adorned the catacombs of Rome. These images were not decorations, but silent proclamations of faith, carved and painted by a persecuted Church that often could not speak openly. They bore witness to the same truth preached by the apostles: that the Word truly became flesh and dwelt among us.

By the fourth and fifth centuries, following the peace of the Church, icons were present everywhere: in churches, monasteries, homes, and pilgrimage sites throughout the Christian world. They were found in Rome, Constantinople, Alexandria, Antioch, Jerusalem, and far beyond. Icons accompanied the liturgy, marked feast days, and served as visual Scripture for the faithful. No Ecumenical Council ever introduced them, because none was needed; their use was received as part of the Church’s living tradition, passed down through worship rather than decree.

The Fathers themselves testify to this continuity. Saint Basil the Great states plainly:

“the honour paid to the image passes on to the prototype” (St Basil the Great, On the Holy Spirit XVIII.45, NPNF 2nd series, vol. 8).

This statement, written in the fourth century, long before Iconoclasm, shows that the theological principle underlying icon veneration was already understood and accepted. Likewise, Saint Gregory of Nyssa speaks of images as teaching tools that move the heart toward contemplation, and Saint John Chrysostom refers to sacred images as reminders of virtue and imitation.

Even more striking is the Church’s memory of acheiropoietai, icons “not made by hands”, such as the image of Christ associated with King Abgar of Edessa. Whether one emphasizes the historical tradition or the theological meaning, the Church understood such images as witnesses to the reality that Christ’s face could be seen, remembered, and represented, precisely because He truly became man.

Thus Iconoclasm did not arise because icons suddenly appeared, but because they had long been accepted and loved. It arose in the eighth century, during a period of great upheaval within the Eastern Roman (Byzantine) Empire. The empire faced relentless military pressure from Islamic forces, which strictly forbade images and accused Christians of idolatry. At the same time, earthquakes, plagues, and military defeats were interpreted by some as signs of divine judgment. In this climate of fear, certain emperors and bishops began to suspect that the Church’s ancient use of icons had provoked God’s anger.

Thus Iconoclasm emerged not from apostolic tradition, but from political anxiety and theological insecurity. Emperors such as Leo III and Constantine V sought to reform the Church by imperial command, ordering the removal and destruction of icons, closing monasteries, and violently persecuting those who resisted. Monks were beaten, exiled, mutilated, and killed, because monastic communities were the chief guardians of icon veneration and living tradition.

Iconoclasm claimed to defend the transcendence of God and to protect the Church from idolatry. Its proponents argued that since God is invisible and incomprehensible, any depiction of Christ or the saints violated divine majesty. Yet in doing so, they forgot, or refused, the central truth of the Gospel: that God became visible. In rejecting icons, they rejected the visible confession of the Incarnation and implicitly returned to a pre Christian understanding of God as forever unseen and untouchable.

The Apostle John proclaims plainly: “the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory” (John 1:14, KJV). The Incarnation is not a metaphor, but a historical and visible reality. The Son of God did not merely appear human, nor did He dwell invisibly among men; He was seen, touched, handled, and known. As the Apostle testifies: “That which was from the beginning, which we have heard, which we have seen with our eyes, which we have looked upon, and our hands have handled, of the Word of life” (1 John 1:1, KJV). To deny that Christ may be depicted is to deny that He was truly seen.

The Church therefore gathered at Nicaea in 787 AD, the same city where the divinity of the Son had been confessed centuries earlier, not to introduce icons, but to defend what had always been practiced. The bishops restored the apostolic and patristic witness that holy images are legitimate confessions of the Incarnation and visible testimonies that God has sanctified matter by entering it Himself.

The Council carefully distinguished between worship (latreia), which belongs to God alone, and veneration (proskynesis), which is honor given to persons and objects insofar as they point beyond themselves to God. This distinction was not philosophical hair splitting, but essential to preserving both the transcendence of God and the reality of the Incarnation. Icons are not worshiped as gods; they are honored as windows to divine reality, leading the faithful to Christ Himself.

Saint John of Damascus, standing firmly within this ancient tradition, expressed the Orthodox position with clarity:

St John of Damascus answered that he does not worship matter but the Creator of matter, who became matter for his sake and wrought his salvation through matter.

Thus the Seventh Ecumenical Council did not innovate; it remembered. It defended not a new practice, but the Church’s ancient confession that the invisible God has become visible in Christ. By restoring icons, the Church preserved the integrity of the Incarnation in worship, just as the earlier councils had preserved it in doctrine.

The Aftermath of the Seven Ecumenical Councils

With the Seventh Ecumenical Council, the Church completed the essential dogmatic articulation of the apostolic faith. The Seven Councils did not exhaust the mystery of God, but they set the boundaries within which the mystery may be worshiped without distortion. They confessed:

One God in three Persons

One Lord Jesus Christ, one Person in two natures

Full divinity and full humanity, including will and energy

Salvation accomplished through the real Incarnation

Worship grounded in truth, not abstraction

As our beloved St. Paul stated:

“Now I beseech you, brethren, by the name of our Lord Jesus Christ, that ye all speak the same thing, and that there be no divisions among you; but that ye be perfectly joined together in the same mind and in the same judgment” (1 Corinthians 1:10, KJV).

Together, the Councils formed a single, harmonious confession. Each council answered a specific heresy, yet all served one purpose: to preserve the unity of Christ and therefore the unity of the Church. As the Apostle teaches, “Jesus Christ the same yesterday, and to day, and” (Hebrews 13:8, KJV). The Councils did not change Christ; they protected the Church from changing Him.

The aftermath of the Councils reveals a profound truth: doctrinal unity requires humility and obedience. Where the Councils were received, the Church remained one in faith. Where they were rejected, division followed, not because the truth failed, but because communion was broken. The schisms that arose were wounds in history, not alterations of doctrine.

“Knowing this first, that no prophecy of the scripture is of any private interpretation” (2 Peter 1:20, KJV).

From this point forward, the Church would face new challenges, political pressures, cultural differences, and later, the tragic rupture between East and West. Yet the Seven Ecumenical Councils remained the shared foundation of Orthodoxy, the measure by which all later teachings are judged.

They stand as a living witness that the Church does not invent her faith, but guards it, not by private interpretation, but by conciliar confession in the Holy Spirit. As the Lord Himself prayed: “That they all may be one; as thou, Father, art in me, and I in thee” (John 17:21, KJV). The Seven Ecumenical Councils are the Church’s faithful answer to that prayer.